Screw Anchor Anchor Diameter 3/8 in Overall Length 4 in Head Type Hex Head Width 0.56 in Head Diameter Not Applicable Drive Type External Hex Material Stainless Steel Finish Zinc Plated Material Grade/Class 410 Removable Removable Compatible Material Concrete Drill Bit Size 5/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Maximum Material Thickness 2 1/2 in Maximum Ultimate Shear Strength 3 416 lb Maximum Ultimate Tension Strength 1 968 lb